Example usage for org.w3c.dom Element isDefaultNamespace

Introduction

In this page you can find the example usage for org.w3c.dom Element isDefaultNamespace.

Prototype

public boolean isDefaultNamespace(String namespaceURI);

Source Link

Document

This method checks if the specified namespaceURI is the default namespace or not.

Usage

From source file:com.marklogic.dom.DocumentImpl.java

@Override
public boolean isDefaultNamespace(String namespaceURI) {
    Element e = getDocumentElement();
    return e != null ? e.isDefaultNamespace(namespaceURI) : false;
}

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From source file:com.evolveum.midpoint.util.DOMUtil.java

/**
 * @param element Element, on which the namespace declaration is evaluated
 * @param namespaceUri Namespace URI to be assigned to a prefix
 * @param preferredPrefix Preferred prefix
 * @param definitionElement Element, on which namespace declaration will be created (there should not be any redefinitions between definitionElement and element in order for this to work...)
 * @param allowUseOfDefaultNamespace If we are allowed to use default namespace (i.e. return empty prefix). This is important for QNames, see setQNameValue
 * @return prefix that is really used//from   w  w  w.j av a2 s .co  m
 *
 * Returned prefix is never null nor "" if allowUseOfDefaultNamespace is false.
 */

public static String lookupOrCreateNamespaceDeclaration(Element element, String namespaceUri,
        String preferredPrefix, Element definitionElement, boolean allowUseOfDefaultNamespace) {
    // We need to figure out correct prefix. We have namespace URI, but we
    // need a prefix to specify in the xsi:type or element name
    if (!StringUtils.isBlank(preferredPrefix)) {
        String namespaceForPreferredPrefix = element.lookupNamespaceURI(preferredPrefix);
        if (namespaceForPreferredPrefix == null) {
            // preferred prefix is not yet bound
            setNamespaceDeclaration(definitionElement, preferredPrefix, namespaceUri);
            return preferredPrefix;
        } else {
            if (namespaceForPreferredPrefix.equals(namespaceUri)) {
                return preferredPrefix;
            } else {
                // Prefix conflict, we need to create different prefix
                // Just going on will do that 
            }
        }
    }
    if (allowUseOfDefaultNamespace && element.isDefaultNamespace(namespaceUri)) {
        // Namespace URI is a default namespace. Return empty prefix;
        return "";
    }
    // We DO NOT WANT to use default namespace for QNames. QNames without prefix are NOT considered by midPoint to belong to the default namespace.
    String prefix = element.lookupPrefix(namespaceUri);
    if (prefix == null) {
        // generate random prefix
        boolean gotIt = false;
        for (int i = 0; i < RANDOM_ATTR_PREFIX_MAX_ITERATIONS; i++) {
            prefix = generatePrefix();
            if (element.lookupNamespaceURI(prefix) == null) {
                // the prefix is free
                gotIt = true;
                break;
            }
        }
        if (!gotIt) {
            throw new IllegalStateException("Unable to generate unique prefix for namespace " + namespaceUri
                    + " even after " + RANDOM_ATTR_PREFIX_MAX_ITERATIONS + " attempts");
        }
        setNamespaceDeclaration(definitionElement, prefix, namespaceUri);
    }
    return prefix;
}

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